Acestridium is a genus of freshwater fish in the family Loricariidae of order Siluriformes.

The genus name is derived from Latinised Greek 'agkistron' meaning hook.

[1] Acestridium species are native to small streams of the Amazon region of Brazil, Venezuela, and Colombia.

[2] Species of this genus are found in litter banks.

Adult length is 5–7 cm and each species shows adaptation for camouflage in the water margins - bright green leaf like in Acestridium dichromum[4] and varigated brown in other species.